Question

1. a square has side length 20 m. find its perimeter.

Explanation:

Step1: Recall perimeter formula

The perimeter formula of a square is $P = 4s$, where $s$ is the side - length.

Step2: Substitute side - length value

Given $s = 20$ m, substitute into the formula: $P=4\times20$.

Step3: Calculate the result

$4\times20 = 80$ m.

Answer:

80 m